Variable-speed transmission



May 5, 1925.

D.1 S. DE LAVAUD VARIABLE SPEED TRANSMISSION Filed July vl, '1924 2 sheets-shew 1 may s, 1925. 1,536,820

v D. S. DE LAVAUD VARIABLE SPEED TRANSMISSIO Filed July 7, 1924A 2 Sheets-Sheet 2 Inventor.

fa/www,

UNITEEl lli l il implication Meer :filly 7,

To all wiz-om t may conce/fa:

Be it known that l', Bmrrrnr Snivseun on LAVAUD, a citizen of *be United States of Brazil, and resident ofi tbe city fnrisn in the Republic of Fenice. have invented cer.- tain new and useful improv` nente im VariableSpeed Trans Aission7 as described in the following specification and illustrated in the accompanying drawings, tiret form part of the same.

The riueijoalv objects of the. invention are to improve the construction of tbe type of transmission mechanism which etilises an oscillateble member rotatably connecteri with tbe drive shaft to operate a plurality of reciprocable members to impart motion to the driven shaft and particularly to ob tain a more iexible connection between tbe drivin(y oscillatinfr-meniber anfl the driven member and to ensure strength and durability of the high speed power transmitting arts.

`A still further object is to simplify tbe construction in the mechanism for maintaining tbe balance of the osciliatable driving member.

The principal feature olf tbe liuivention consists in the novel` construction of tbe journal .connections oi" tbe reciprocable members to tbecscillating lriving member, whereby a stur ensiive universal connect is esuli euri whereby tbe Carcian ring support ol' the loating oscillatingf member is eonii'erl inside the sairl 1ne1nberv A further importent feature consists in the novel menner ei .:onneetiu;. the oseillating member will: tbe elesic balancing; medium.

In tbe irawinirs3 Figure 'i is a longitudinal midsectionui View parlly on tbe liuc ll olf Figure 2.

Figure Q1 is an elevational :nul part ser tional view on tbe line 2-2 oi Figure l.

Figure 3 is a 'transverse sectional view of the journal connection for the reciprocatin g members with the (lriven members.

Figure 4 is 'an elevational and part seclional view of one of the recin'ozaling niembers showing the ldrivingY and llriven meinbers.

The transmission oi' power at variable speeds through the operation olf en oscillatable member rotatable with the driving shaft and carryingl a non-rotative member Serial No. 724,607.

to operate a plurality of reciprocable menibers which actuate to impart a rotary :.notion to a transverse shaft .bas been disclosed in my 3o-pending applications, and elastic resistance couples have also been previously disclosed.

In the construction herein shown the sleeve 1 encircling the crank extension 2 and pivoted on the pin 3, 'is encircled by tbe Cardan ring 4 which is provided with radially disposed orilices 5 in which ere arranged the roller beerings 6.

A sleeve 7 encircles the ring; fr and is mounted on tbe ball bearings 8 carried by the sieeve 1 and the sleeve l rotates freely within the sleeve 7.

The Cardan ring; is pivotsily connected to the sleeve 'Z by a pair of pins 9 arranged cliainetrically opposite and extenriing into the radially disposed roller bee-ring orices 5.

'Elie ring 4 is anchored from rotation by the projectingvpins l() which extend through openings in 'the sleeve 7 and engaged by the horizontally sliclable rods li arranged in the bushings l2 in 'the frame structure of the enclosing casing 13.

Illie engaging; Contact between tliepins '10 :ind the rods ll is preferably through roller bearings 14 arranged in the rods ll.

'llxe sleeve 7 is rmed with a plurality of pairs of lugs l5 arrangeel in 'liainericelly opposite relation and spaced between the uxcs of the pins 9 and ll).

'lbe lugs 'l5 support tbe ball bearings 16 and in these bearings are mounted the cross pins i7, each ol' which is provided with a transverse orifice li in which is located a roller beariimr ll.

The' reciprocating power transmitting rods 2,0 are eacli formed with jaw ends 2l which embrace the cross pins l? and pins 22 extending transversely o' tbe jaws 2l. vbear upon tbe roller .bearings i9. This ball. and roller bearing connection forms a very free and easily operable universal joint.

At the opposite ends of the rods 20 the beads 23 secured thereto are each formeel with :l part spherical bore in which is locateel a socket member 24 which forms tbe race way lfor the roller bearings Q5 of tbe bushing 2G.

.iliaslxers 27 are arranged at each end of tbc bushing QG andL enclose ille roller beerings.. 'The bushing;` 26 is mounted upon a 5. ln a` `variable speed transmission, a d rive lshall having,l a crank exlension, an osrillafingg member mounted on said crank, a plurality of rods connected to said oscillat ing member, ratchet members connected to the driven shaft, transversely arranged pins secured in said ratchet members, spherically Aformed socket members encircling said pins and forming parl", with said' rods, spherically surifaced rings arranged in said socket members, and journal bearings supporting said rings on said pins.

(i. In a variable speed transmission, the combination with a crank driving shaft, a sleeve oscillatably suppi'n-ted Io'n said crank shaft, a sleeve rotatably mounted on the aforesaid sleeve, a Cardan ring arranged between said sleeves having radial orifices,

pins extending inwardly from the ouier ringme'nfiber. having a plurality of arms having orifices 'bereim pins extending from Lhe- Cardan ring into said orilices, roller bear ings in said orifices surrounding said Cardan ring pins, spring means for stabilizingr tbe movement of tbe Cardan ring, a piston lixed in relation to tbe longitudinal movement, a tube enelosii'ig said piston, a tube leading 'from the aforesaid tube to an oil supply, and a valve arranged in said piston adapted to control the flow of oil.

@mir-ai sENsAUD DE LAVAUD. 

